I don't think your depression is out of no where at all. I've been having trouble with depression too.My husband was having a hard time understanding my pregnancy symptoms. Even though he knew that they were to be expected, he wanted me to magically overlook the nausea and moodswings. I don't really know how it happened, but he's been so patient and understanding the last few weeks. Its been wonderful. I think he just need time to adjust. Whatever the cause for his improved attitude, I am feeling sooo much better; I'm not depressed at all.Your depression is probably both hormonal and enviromental. Its hard to be happy when you're fighting with your partner. The last comment was right on, don't feed the fire. let things calm down there a bit and if he still isn't adjusting, talk to him about how you feel, and about how fighting is impacting your. Make sure you aren't agressive, don't accuse him, just tell him. When my husband realized how much i needed his support, he came around. Good luck!